Production of narrow curvilinear nonelastic tape



July 22, 19

47, v, MOORE 2,424,41

PRODUCTION OF NARROW CURVILINEAR NONELASTIC TAPE Filed May 27, "1946 Alufl.

INVENTOR.

Patented July 22, 1947 PRODUCTION OF NARROW CURVILINEAR' NONELASTIC TAPEJohn V. Moore, Pawtucket, R. I., assignor to Moore Fabric Company,Pawtucket, R. I., a corporation of Rhode Island Application May 27,1946, Serial No. 672,635

1 Claim. 1

This invention relates to the production of narrow curvilinearnon-elastic tape, such as zipper tape. A curvilinear Zipper tape, withthe bead at the short or concave edge, has substantial advantages inuse, as coacting curved zipper tapes are more quickly and easilyconnected and, when connected, they fit more smoothly over contouredsurfaces.

It is the general object of my invention to provide a curvilinearnon-elastic zipper tape or the like with an improved weave constructionby which the tape has a controlled and regular longitudinal curvature,and with the cord, if for zipper use, located at the short or concaveedge of the tape.

A further object is to provide an improved method of production of anarrow curvilinear non-elastic tape with controlled curvature.

One form of mechanism adapted for the carrying out of my invention isshown in the drawings, in which Fig. 1 is a perspective view of parts ofa narrow ware loom on which narrow curvilinear nonelastic tape may bewoven by my improved method;

Fig. 2 is a diagrammatic view illustrating the beaming of a warp for usein making my improved tape;

Fig. 3 is a plan view of a portion of my improved tape; and

Fig. 4 is a transverse section of the tape.

Referring to Fig. l, which is more or less diagrammatic, I have shownsuch parts of a narrow- Ware loom as are necessary to disclose andexplain my invention.

I have shown a breast beam it, a lay ll provided with guide-blocks l2for a narrow-Ware shuttle (not shown), and a reed l3 which is preferablygraduated and has its dents placed more closely together toward theright-hand end of the reed as viewed in the drawing. I have also shown aplurality of harnesses l5 and a warp guide-roll I! positionedsubstantially at the rear of the harnesses.

Non-elastic warp threads W are supplied from a tapered warp beam 20,rotatably mounted and provided with a suitable friction device 22. Anon-elastic cord C is supplied from a separate cylindrical warp beam 30,also rotatably mounted and provided with a friction device 32,Nonelastic warp threads W for Weaving the tube or sleeve S (Fig. 4) aresupplied from a third and cylindrical warp beam 40 which is rotatablymounted and has a separate friction device 4|. The warp threads W and Wand the cord C pass from the warp beams 20, 30 and 40 over a guidebar 35and through an assembly reed 35 to the guide-roll 5?. The reed 35 ispreferably graduated to correspond to the reed !3 on the lay H.

The tape T passes over a guide-roll .5 on the breast beam It], whichguide-roll should also be tapered as indicated in the drawing. The tapeT then passes around a tapered take-up roll 50 and a cylindricalguide-roll 5! and is wound on a tapered cloth roll 52. The roll 56 ismounted on a take-up shaft 54 which is positively driven.

The usual mechanism is provided for raising and lowering the harnessesand for reciprocating the shuttle by which the non-elastic wefts F (Fig.3) are inserted.

In Fig. 2, I have indicated the preferred beamin of the warps W on thetapered warp beam 29 by drawing the warps through a graduated reed til,with the dents more closely spaced toward tapered warp beam 25 bydrawing the warps through the graduated reed 68 as shown in Fig. 2,which results in the warps W being longer and more closely spaced at thelarger end of the beam 29, and in being gradually shortened and morewidely spaced toward the smaller end of the beam.

The tape T is then woven by drawing the warps W and W and the cord Cthrough the graduated reed 35 to the harnesses l5 and thence through thegraduated reed I3 on the lay II, at which point the non-elastic wefts Fare inserted by the usual positively-driven shuttle which isreciprocated between the guide-blocks l2. The tape T is then drawndownward over the tapered guideroll I4 by the positively rotated andtapered takeup roll 50, and is wound on the tapered cloth roll 52.

The supplying of non-elastic warp threads W of greater length and moreclosely spaced at the right-hand edge of the tape T (as viewed inFig. 1) provides a controlled curvature for th tape, which is wovenlonger and substantially convex at its right-hand edge. This curvatureis preserved by drawing down the tape by the tapered take-up roll 50 andby winding the tape on the tapered cloth roll 52.

As the threads at the right-hand edge of the warp are longer and aredrawn more rapidly through the reed 13 than those at the left-hand orshorter edge, the weft threads are fanned-out and are slightly morewidely spaced at the convex edge of the tape.

By combining th graduated spacing of the non-elastic warps on thetapered warp beam 20 with the provision of me tapered reed 13 at theweaving point and by winding down the tape more rapidly at the longerand more closely woven edge, a definite and accurately controlledcurvature may be imparted to the non-elastic tape T.

If the tape is intended for zipper purposes, the relatively heavy cord Cis inserted in a sleeve S at the shorter or concave edge of the tape.

Having thus described my invention and the advantages thereof, I do notwish to be limited to the details herein disclosed, otherwise than asset forth in the claim, but what I claim is:

The method of weaving narrow curvilinear non-elastic zipper tape whichconsists in supplying non-elastic regular warp threads faster and withcloser spacing at the convex edge of the tape to be woven, supplying arelatively shorter and thick non-elastic cord warp adjacent the concaveedge of the tape and from a, separate source of supply, supplyingspecial non-elastic warp threads from a third source of supply to form atube for said cord warp, taking up the woven tape faster along theconvex edge, and inserting wefts which are increasingly spaced aparttoward the convex edge of the tape by the more rapid feed and mor rapidtake-up of the regular warp threads at said convex edge.

JOHN V. MOORE.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 1,639,376 Hesse Aug. 16, 19271,770,740 Moore July 15, 1930 1,796,041 Moore Mar. 10, 1931 2,100,645Hendley Nov. 30, 1937 FOREIGN PATENTS Number Country Date France Oct. 7,1909

